标题： 寻找 Z'→e^+e^-：利用正负电子对的质量和角分布 显示英文标题

标题： Search for Z'--> e^+e^- Using Dielectron Mass and Angular Distribution

摘要： 我们搜索质子-反质子对撞中产生的正负电子事例中的 Z'玻色子，碰撞能量为 sqrt{s}= 1.96 TeV，使用的是费米实验室Tevatron上的CDF II探测器收集的0.45 fb^(-1)的数据集。为了识别 Z' --> e^+e^-信号，我们利用了正负电子不变质量分布和电子对的角度分布。没有发现信号的证据，并且对几种模型的Z'质量设定了95%置信水平下的下限。还对通用Z'的质量和规范耦合以及不同极化结构场景下的接触相互作用质量尺度设定了限制。 显示英文摘要

摘要： We search for Z' bosons in dielectron events produced in ppbar collisions at sqrt{s}=1.96 TeV, using a 0.45 fb^(-1) dataset accumulated with the CDF II detector at the Fermilab Tevatron. To identify the Z' --> e^+e^- signal, both the dielectron invariant mass distribution and the angular distribution of the electron pair are used. No evidence of a signal is found, and 95% confidence level lower limits are set on the Z' mass for several models. Limits are also placed on the mass and gauge coupling of a generic Z', as well as on the contact interaction mass scales for different helicity structure scenarios.